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???
09/20/06 20:30
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#124718 - that you do not clear the reason
Responding to: ???'s previous message
Where is the mistake?

that you do not clear the reason.

example:
you set KBI to interrupt on a mismatch of 0
a key is pressed
you have a mismatch to 0
you clear KBIF
KBIF immediately gtet set again because you have a mismatch to 0

you must remove the reason for KBIF to be set before you clear it.

Erik


List of 22 messages in thread
TopicAuthorDate
LPC 9xx Can't clear KBIF            01/01/70 00:00      
   Turn it off?            01/01/70 00:00      
   I could turn it off            01/01/70 00:00      
      to turn the KBIF, you have to change the condition            01/01/70 00:00      
         Thanks Erik - I'll give it a go            01/01/70 00:00      
            an added comment            01/01/70 00:00      
               What is the rate of change on the input signals?            01/01/70 00:00      
                  nothing of value except the ability to wake up the            01/01/70 00:00      
                     Interrupt for pulse train            01/01/70 00:00      
                        that's basically what the KBI does            01/01/70 00:00      
                  Rate of change ~<100kHz            01/01/70 00:00      
               why not?            01/01/70 00:00      
                  I did not discuss            01/01/70 00:00      
                     It is ok but KBIF is set forever            01/01/70 00:00      
                        that you do not clear the reason            01/01/70 00:00      
                           I change the state of the pin before            01/01/70 00:00      
                              could be the problem            01/01/70 00:00      
                                 Simulators problem            01/01/70 00:00      
   Remote Control using AT89C2051 schematic            01/01/70 00:00      
      just great            01/01/70 00:00      
         Another BS answer.            01/01/70 00:00      
            No BS, I did            01/01/70 00:00      

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